nfdump(1) on Linux
The text 7a081bad695d, as Debian 5.0 (Lenny) shipped it.
netflow display and analyze program
Flags it lists
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-A -
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-I -
-K -
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-M -
-N -
-O -
-R -
-S -
-V -
-X -
-Z -
-a -
-c -
-f -
-h -
-l -
-m -
-n -
-o -
-q -
-r -
-s -
-t -
-v -
-w -
-z